Results 1 issues of Jin Dou

The bug causes the `tmin` and `tmax` being reversed twice at this two places in the nested_crossval function: https://github.com/powerfulbean/mTRFpy/blob/53838c8e71231e772f384e06ab322ed72d867a87/mtrf/stats.py#L124 https://github.com/powerfulbean/mTRFpy/blob/53838c8e71231e772f384e06ab322ed72d867a87/mtrf/stats.py#L269-L275 Thus the finally trained decoding model uses the wrong tmin...

bug